EECS 1 Lecture Notes - Lecture 5: Digital Signal Processing, Optoelectronics, Materials Science

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EECS 18000 Intro to EE & CPE
Week 5 Lecture 5 Intro to EE and CS
Ozdal Boyraz
Summer 1995
Came to US for graduate studies
o Interest in communications
Time then
o A time when wireless communication was nonexistent
Fiberoptic was blooming then
Using lights for optical communication systems
o EE was a kind of area that was at an intersection with the materials side
Physics and engineering, as well as materials science
EE
Five specializations
o Electronic Circuit Design
o RF, Antennas, and Microwaves
o Semiconductors and Optoelectronics
o Digital Signal Processing
o Communications
Semiconductors and Optoelectronics
General Perspective (Engineering)
o Most of what we are doing has something to do with transferring
phenomena
Controlling the transport
Designing a system that transports in a meaningful way or control
what is being transported and how to translate in a sensible way
o Engineering is based on transports
Examples:
Mass transport
o Physical objects being loaded and moved
Charge transport
o Storing and transferring
Energy transport
o Electromagnetic waves, light etc.
o Transporting this type of energy from one place to
another
Ways to convey message
o Brain interprets the sounds carried over in a certain way
Acoustic communication
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If there was no understanding of language, language would sound
like nothing more than random, unintelligible sounds
But our brains have been trained to understand this type of
information, and so we understand it
o Electronic or Optical Signaling
You can convey the same message by using electrons or light
Electronic or optical systems make devices that can produce
meaningful result by controlling the electrons or photons (light)
Light is transferred from one medium to another
You are using the same method, but changing the changed particle
with mass, to an energy (photon) with no mass but energy to
convey a message
These deal with devices that can control the flow of the photons
(light energy), and dealing with the generation of these particles,
the flow, and the detection of these particles to parse a special
message
Semiconductors
o Conductors
Typically metals
Very good conductivity of electricity
Electrons flow from one end to the other end with low loss
o Insulators
o In semiconductors, you can control the activity
They are in between insulators and conductors and can navigate
between the two extremes
Tunable materials in fabrication and when applied voltage to
Or when applying a light
o Diodes
Most basic devices you can make by using semiconductors
It is a switch
In positive voltage, it acts like a low resistance (a piece of
metal wire)
At negative, behaves like an insulator, no current flows
Is used as a rectifier helps to convert sinusoidal signals to
DC signals
Acts like a glass, and allows for flow control
Is actually a mechanism with alternating currents that oscillate at
60Hz
If you apply this, it will access the positive part of the signal
and the negative will be clipped
Is used to convert the negative part of the conductor to a
different current
o Conducting an alternative current
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EECS 1 Full Course Notes
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EECS 1 Full Course Notes
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Document Summary

Eecs 18000 intro to ee & cpe. Week 5 lecture 5 intro to ee and cs. Ozdal boyraz: summer 1995, came to us for graduate studies. Ee: five specializations, electronic circuit design, rf, antennas, and microwaves, semiconductors and optoelectronics, digital signal processing, communications. In positive voltage, it acts like a low resistance (a piece of metal wire: at negative, behaves like an insulator, no current flows. Is used as a rectifier helps to convert sinusoidal signals to. Dc signals: acts like a glass, and allows for flow control. Is actually a mechanism with alternating currents that oscillate at. If you apply this, it will access the positive part of the signal and the negative will be clipped. Incoming information is changed into semiconductor material: solar cells, diode devices without voltage applications, free running device. It"s quite a challenge for engineering: to be realized in the next few years. Impact: energy, more efficient devices for generation and also for consumption.

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